Django-content-editor

===================

- Raise tests coverage back to 100% after the ``PluginRenderer.render``
change in 0.6.
- Simplify the implementation of the return value of
``PluginRenderer.render``. Empty regions are now falsy again.

===================

- The return value of ``PluginRenderer.render`` now allows outputting
individual items as well as the concatenated output of all items as
before.
- Added this change log.

===================

- Made tests using Djangomaster pass again by switching to my fork of
django-mptt.
- Simplified the way package data is specified in setup.py.

===================

- Added a check to Django's checks framework for custom content editor
fieldsets.
- Streamlined the implementation of ``PluginRenderer``, allow rendering
a single plugin.
- Added documentation for ``Contents`` and its helpers.
- Added infrastructure for running the tests using ``./setup.py test``.

===================

- Replaced the ``ContentEditorForm`` with a ``formfield_for_dbfield``
override for easier model form customization.
- Replaced the ``ContentProxy`` concept with a generic ``Contents``
class and various helpers for fetching contents.
- Added a simple ``PluginRenderer`` for registering render functions
for a plugin class tree.

===================

- Added comments, documentation.
- Fixed the JavaScript tag generation by the ``JS`` class.
- Only auto-fill our own ordering fields.